| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #include "arrow/util/compression_internal.h" |
| |
| #include <cstddef> |
| #include <cstdint> |
| #include <memory> |
| |
| #include <snappy.h> |
| |
| #include "arrow/result.h" |
| #include "arrow/status.h" |
| #include "arrow/util/logging.h" |
| #include "arrow/util/macros.h" |
| |
| using std::size_t; |
| |
| namespace arrow { |
| namespace util { |
| namespace internal { |
| |
| namespace { |
| |
| // ---------------------------------------------------------------------- |
| // Snappy implementation |
| |
| class SnappyCodec : public Codec { |
| public: |
| Result<int64_t> Decompress(int64_t input_len, const uint8_t* input, |
| int64_t output_buffer_len, uint8_t* output_buffer) override { |
| size_t decompressed_size; |
| if (!snappy::GetUncompressedLength(reinterpret_cast<const char*>(input), |
| static_cast<size_t>(input_len), |
| &decompressed_size)) { |
| return Status::IOError("Corrupt snappy compressed data."); |
| } |
| if (output_buffer_len < static_cast<int64_t>(decompressed_size)) { |
| return Status::Invalid("Output buffer size (", output_buffer_len, ") must be ", |
| decompressed_size, " or larger."); |
| } |
| if (!snappy::RawUncompress(reinterpret_cast<const char*>(input), |
| static_cast<size_t>(input_len), |
| reinterpret_cast<char*>(output_buffer))) { |
| return Status::IOError("Corrupt snappy compressed data."); |
| } |
| return static_cast<int64_t>(decompressed_size); |
| } |
| |
| int64_t MaxCompressedLen(int64_t input_len, |
| const uint8_t* ARROW_ARG_UNUSED(input)) override { |
| DCHECK_GE(input_len, 0); |
| return snappy::MaxCompressedLength(static_cast<size_t>(input_len)); |
| } |
| |
| Result<int64_t> Compress(int64_t input_len, const uint8_t* input, |
| int64_t ARROW_ARG_UNUSED(output_buffer_len), |
| uint8_t* output_buffer) override { |
| size_t output_size; |
| snappy::RawCompress(reinterpret_cast<const char*>(input), |
| static_cast<size_t>(input_len), |
| reinterpret_cast<char*>(output_buffer), &output_size); |
| return static_cast<int64_t>(output_size); |
| } |
| |
| Result<std::shared_ptr<Compressor>> MakeCompressor() override { |
| return Status::NotImplemented("Streaming compression unsupported with Snappy"); |
| } |
| |
| Result<std::shared_ptr<Decompressor>> MakeDecompressor() override { |
| return Status::NotImplemented("Streaming decompression unsupported with Snappy"); |
| } |
| |
| Compression::type compression_type() const override { return Compression::SNAPPY; } |
| }; |
| |
| } // namespace |
| |
| std::unique_ptr<Codec> MakeSnappyCodec() { |
| return std::unique_ptr<Codec>(new SnappyCodec()); |
| } |
| |
| } // namespace internal |
| } // namespace util |
| } // namespace arrow |